Both Firefox and Google Chrome browsers already have spell-checker, You just need to install additional dictionary in Firefox, in Google Chrome most of the dictionaries are enabled by default. If You want to use spell-checker in Internet Explorer, You need to install additional plug-in or toolbar, e.g., Google toolbar.

Mozilla Firefox

1. Select Tools and then Options.
2. Choose Advanced, then mark the select box next to "Check my spelling as I type".
3. Click „OK” and save the settings.
4. Click on the right mouse button when writing a new letter. Make sure that „Check spelling” option is enabled.
5. Select "Languages: Add Dictionaries" from the drop-down menu.
6. Choose the desired dictionary on the next page. For example: Russian by clicking on "Install Dictionary" button.
7. Click on "Add to Firefox", wait until the dowload is finished and click „Install” to complete the installation.
8. Click on "Restart Now" to restart the web browser.

Google Chrome

1. Click on the icon with the wrench (Customize and control Google Chrome).
2. Select "Settings" from the drop-down menu.
3. Click on "Show Advanced Settings" to display advanced settings.
4. Go to „Languages” and click "Languages and spell-checker settings..."
5. Click on "Add" to add languages.
6. Select language from the drop-down list and press "OK".
7. Select the language You’ve added and click on "Use this language for spell checking".
8. Make sure that field "Enable spell checking" is checked. Press "OK".

Internet Explorer

1. Install Google toolbar from http://toolbar.google.com
2. Click on the wrench icon on the Google toolbar.
3. Go to "Tools" and mark "Spell check".
4. Click "Save" to save settings.
5. Click on "Check" on the Google toolbar, go to Language and select the desired language.